Hydrogen: Jurnal Kependidikan Kimia
Hydrogen: The Chemistry Education Journal published by the Chemistry Education Study Program which contains articles raised from the results of conceptual research and studies in chemistry and chemistry education including education and learning, device development, media and learning models.
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<![CDATA[The Effectiveness of Interactive E-Modules as Learning Media to Train Visual Spatial Intelligence in Chemical Bond Material ]]>
<![CDATA[Fatmawati, Ria]]>;
<![CDATA[Sukarmin, Sukarmin]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.8940
<![CDATA[This study aims to determine the effectiveness of interactive e-module that train students' visual intelligence on chemical bond material. Chemical bond is one of the high school chemistry materials that has basic concepts that must be mastered in order to understand other chemistry topics and abstracts require the ability to understand what must be stimulated. This study was compiled based on the 4D research and development (R&D) model. The subjects and population of this study were students of class XI IPA at SMAN 12 Surabaya. The effectiveness of the review of cognitive domain tests and spatial visual intelligence tests before and after the use of a 3D visualialization base interactive e-module. The analysis of this study used N-gain and normality statistical tests until the data were normally distributed. The effectiveness of the media was stated to be very effective with an N-Gain score on the cognitive test of 0.8 in the high category and the spatial visual intelligence test of 0.8 in the high category which shows the relationship between cognitive domain tests and visual spatial tests can improve understanding of chemical bond material. The results of the research show that it is feasible to implement]]>
<![CDATA[Development of Cooperative Learning-Based Student Worksheets (LKPD) on Chemical Nomenclature Subject Material for 10th Grade Students ]]>
<![CDATA[Septiana, Tri Merry]]>;
<![CDATA[Sartika, Rody Putra]]>;
<![CDATA[Rasmawan, Rahmat]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.10761
<![CDATA[AbstractResearch has been done to develop a product in the form of student worksheets chemical compounds for SMA/MA grade X. This research aims to develop students ' worksheets of material nomenclature for SMA/MA grade X, knowing the quality of teaching materials based on expert test (expert judgement), knowing student response, and knowing the implementation of learning process. This research and development (R&D) is conducted based on 4-D models that are limited to the develop stage. The subject of this study is the LKPD based on cooperative learning in compound nomenclature. The product is in the quality of one chemical teacher, one Indonesian teacher, and two chemistry lecturers. Based on the results of the expert quality assessment, the LKPD based cooperative learning in compound name matter got very good/very high category with a percentage of 84.27% worth using as a teaching material in the learning process. Keywords: LKPD, Cooperative Learning, feasibility of the product]]>
<![CDATA[Validity Test of E-LKPD to Improve Students' Argumentation Skills on Chemical Equilibrium Material ]]>
<![CDATA[Andreani, Lucky Arthamevia]]>;
<![CDATA[Yonata, Bertha]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11500
<![CDATA[Dalam bidang pendidikan kimia, peserta didik diharapkan dapat mengembangkan keterampilannya sesuai dengan keterampilan yang dibutuhkan pada abad ke-21. Salah satu kompetensi kerangka 4C adalah berpikir kritis dan keterampilan komunikasi. Kedua kompetensi ini dikemas menjadi satu kesatuan dalam keterampilan argumentasi. Keterampilan argumentasi berperan dalam melatih siswa mengembangkan kemampuan berpikirnya sehingga meningkatkan pemahamannya. Tujuan penelitian ini adalah mengembangkan e-LKPD yang valid untuk meningkatkan kemampuan argumentasi siswa dalam konteks kesetimbangan kimia. Metodologi penelitian yang digunakan dalam penelitian ini adalah Research and Development (R&D) dengan menggunakan model pengembangan 4D yang dikemukakan oleh Thiagarajan, yang meliputi tahapan sebagai berikut: pendefinisian, perancangan, pengembangan, dan penyebaran. Namun penelitian ini hanya sebatas tahap pengembangan dengan uji coba terbatas untuk mengetahui kelayakan produk. Keterbatasan ini didasarkan pada beberapa pertimbangan antara lain waktu, tenaga, dan kendala. Validasi dilakukan oleh tiga orang validator yang terdiri dari dua orang dosen program studi pendidikan kimia dan satu orang guru mata pelajaran kimia. Skor validitas yang dihasilkan kemudian dianalisis menggunakan metode mode. Hasil penelitian menunjukkan bahwa E-LKPD valid ditinjau dari validitas isi. Nilai modus untuk kategori ini adalah 5 yang menunjukkan hasil yang sangat valid]]>
<![CDATA[Validity of Electronic Worksheet (E-LKPD) Based on PBL Model to Train Creative Thinking Skills on Acid-Base Material ]]>
<![CDATA[Ainiah, Errisya Nur]]>;
<![CDATA[Yonata, Bertha]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11587
<![CDATA[Creative thinking skills are important to train students to face the challenges of the 21st century and include higher order thinking skills. In addition, the independent curriculum provides freedom to think and innovate in learning. Therefore, one of the efforts to train creative thinking skills is to use relevant learning media, namely E-LKPD based on the Problem Based Learning (PBL) model. The purpose of this research is to produce PBL-based E-LKPD to train the creative thinking skills of grade XI students on acid-base material that is feasible to use, in terms of validity. This research model is guided by Thiagarajan's 4D model (Define, Design, Develop, and Disseminate). However, the research only reached the development stage (Develop) to determine the validity of the product because there were limitations in time, funds, and energy. Validation was conducted by 3 validators to measure the content and construct validity of the developed E-LKPD. The results showed that the validity of the E-LKPD was considered valid based on the median score of content validity of 4 with a valid category and construct validity of 5 with a very valid category.]]>
<![CDATA[Effect of Brix Concentration and pH of Molassses Media on Ethanol Yield in The Fermentation Process at PT. Indo Acidatama. Tbk ]]>
<![CDATA[Hutapea, Henny Parida]]>;
<![CDATA[Ahmadi, Panji]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11668
<![CDATA[PT. Indo Acidatama Tbk. is a company that produces ethanol. Ethanol is produced by fermentation using molasses derived from sugar processing waste. To get the optimal ethanol content, it can be determined from the yield produced, it is necessary to have effectiveness in the fermentation process. In this experiment, the fermentation process was carried out with variations in molasses concentration and pH. The aim was to determine the combination of brix concentration and molasses pH in producing the most effective ethanol yield. The concentration of molasses used was 16 obrix, 20 obrix and 24 obrix. While the pH used was 4, 5 and 6. In the determination of the ethanol content, the separation was carried out by a distillation process, then the distilled ethanol was tested using a spindle alcoholmeter and a chromatographic test was carried out using a Gas Chromatography type 6890N. After getting the ethanol content, the next step is to determine the yield by using the alcohol content calculation. The results of the chromatography test obtained samples of 24 obrix variations and pH 4, getting the highest concentration, which was 3.05%. From the calculation of alcohol content, the sample variation of 16 obrix and pH 5 got the highest yield value, with an average of 26.74. From the results of the Two-Way ANOVA calculation, it was found that obrix and pH had a significant effect on ethanol yield.]]>
<![CDATA[Development Of Teaching Material To Support Merdeka Curriculum On Stoichiometry For Phase F ]]>
<![CDATA[Damiyanti, Damiyanti]]>;
<![CDATA[Mawardi, Mawardi]]>;
<![CDATA[Suryani, Okta]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11687
<![CDATA[This study aims to develop teaching materials to support merdeka curriculum learning on stoichiometry material phase F SMA / MA. This research uses the Eduactional Design Research (EDR) method with the Plomp development model which consists of three stages, namely the preliminary research stage, the development or prototyping phase, and the trial and assessment phase. Data collection was carried out using validity and practicality questionnaires. The subjects of this study were three chemistry lecturers, two chemistry teachers and nine students with high, medium and low ability levels. The validity questionnaire was given to three chemistry lecturers and two chemistry teachers while the practicality questionnaire was given to two chemistry teachers and nine students. The results showed that the validity test obtained a validity value of 88% which was declared a valid category. While the results of the practicality test for chemistry teachers obtained a value of 91% which was declared a very practical category and the results for students obtained a value of 93% which was declared a very practical category. Based on the results of the study, it was found that the development of teaching materials to support merdeka curriculum learning in SMA/MA phase F stoichiometry material was valid and practical]]>
<![CDATA[Development of Video Tutorials for Simple Distillation Tools for Making Essential Oils in Junior High Chemistry Course ]]>
<![CDATA[Listra, Irene Yudea]]>;
<![CDATA[Hairida, Hairida]]>;
<![CDATA[Rasmawan, Rahmat]]>;
<![CDATA[Enawaty, Eny]]>;
<![CDATA[Masriani, Masriani]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11752
<![CDATA[This study aims to develop a video tutorial for simple distillation equipment for making essential oils that is suitable for use in junior high school chemistry courses. The research is a development research using the Design Thinking approach. The Design Thinking approach includes five steps, namely: empathic, definition, idea, prototype, and test. The instruments used in this study are student response questionnaires and validity on video tutorials for simple distillation equipment for making essential oils. The results of validation and student response to the video were analyzed using a Guttman scale and obtained a percentage of validation of the feasibility of media design 100% with a very valid category, articulation and intonation 100% with a very valid category, operation 100% with a very valid category, and suitability of material with sub-CPMK 100% with a very valid category. The percentage in the response test, namely the media display indicator 96.8% with a very good category, 100% operation with a very good category, and 98.95% usefulness with a very good category. Thus it can be concluded that the results of the analysis of video tutorial development are worth testing in the learning process.]]>
<![CDATA[Characterization of Activated Charcoal Produced Using Green Chemistry Principle Approach Number 7 ]]>
<![CDATA[Thohir, Muhammad Bakhru]]>;
<![CDATA[Wijaya, Terry Esi Putri]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11834
<![CDATA[Charcoal is an important component in the effort to provide clean water. One of the water qualities that need to be considered is the level of hardness. Reducing the level of hardness can be done with activated charcoal. The production of activated charcoal uses many synthetic materials. Therefore, aim of research is to produce, test the performance, and characterization of activated charcoal made with natural acids. The stages of this research are charcoal preparation and natural acid activator, carbonization, activation with natural acids (Averrhoa bilimbi L. and Citrus aurantifolia S.), and characterization. The production results were tested for adsorbing ability and characterization using FTIR, SEM, and XRD to determine the functional groups, structure, and components. The results showed that activated charcoal produced using natural acids had better performance in adsorbing. Characterization with FTIR showed the absorption of C-H functional groups shown at 785 cm-1, 1100 cm-1Â for C-O functional groups, 3368 cm-1Â for O-H stretching vibration groups. Typical active charcoal groups were also detected at wave numbers 1704 cm-1for C=O functional groups and 1575 cm-1Â for C=C groups. Characterization with XRD showed the same pattern between charcoal produced with natural acids and the control. SEM images showed clear pores on the surface of the activated charcoal. Thus, natural acids can really be a candidate for activator replacement in the production of activated charcoal that applies the principles of green chemistry.]]>
<![CDATA[Synthesis of Colorimetric Sensor for Cyanide Detection with Iron(III) Chloride reagent Using Sol Gel Method with Smarthphone Combination ]]>
<![CDATA[Rohsaita, Amalia]]>;
<![CDATA[Thohir, Muhammad Bakhru]]>;
<![CDATA[Surya Efendi, Meilisa Rusdiana]]>;
<![CDATA[Kusumaning Tiyas, Windi Pangesti]]>;
<![CDATA[Nursaida, Marta Citra]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11887
<![CDATA[Sensor untuk mendeteksi ion sianida (CN - ) telah berhasil dilakukan dengan metode sol-gel menggunakan prekursor tetraetil ortosilikat dan pereaksi FeCl3. Penelitian ini bertujuan untuk mengetahui kondisi optimal sintesis, kondisi optimal sensor, menentukan LoD dan LoQ. Sintesis dilakukan dengan mencampurkan prekursor dengan pelarut etanol. Selanjutnya ditambahkan H2O, Triton X-100, reagen dan katalis ke dalam campuran. Variasi yang dilakukan adalah konsentrasi reagen dan waktu penuaan terbaik. Hasil sensor dinyatakan dalam nilai Euclidean Distance (ED) titik Merah-Hijau-Biru (RGB) yang diperoleh. Kondisi optimal untuk penyensoran dilakukan dengan memvariasikan waktu kontak. Pada sintesis sol gel konsentrasi reagen terbaik diperoleh pada konsentrasi 0,1 M dan waktu penuaan terbaik adalah 4 hari. Penentuan kondisi sensor optimal terjadi pada waktu 30 detik dengan batas pencucian 120 detik. Validasi metode sensor menghasilkan linearitas pada rentang konsentrasi 100 – 1000 ppm dengan nilai R 2 sebesar 0,9984. LoD dan LoQ masing-masing sebesar 65,45 ppm dan 218,16 ppm. Karakterisasi sensor menggunakan spektrofotometer FTIR dari bilangan gelombang 4000 sampai 400 cm-1. Spektrum IR yang dihasilkan menunjukkan keberhasilan dalam sintesis sol-gel, karena pada penelitian ini SiO2 muncul pada bilangan gelombang sekitar 433 cm-1. Setelah tahap sensor dengan merendam sensor pada analisa CN - 0,01 M dan CN - 0,1 M tidak ada tanda-tanda munculnya gugus Fe-S pada bilangan gelombang 4000-400 cm-1, karena daerah serapannya berada pada 380- 311 cm -1.]]>
<![CDATA[Review of Secondary Metabolites From Melandean Bark Extract (Bridellia Micrantha): Bioactive Potential and Applications in Health ]]>
<![CDATA[Bayani, Faizul]]>;
<![CDATA[Muhali, Muhali]]>;
<![CDATA[Yuliana, Devi]]>;
<![CDATA[Hulyadi, Hulyadi]]>;
<![CDATA[Gargazi, Gargazi]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i3.11956
<![CDATA[Abstract The emergence of various diseases affecting the immune system, such as COVID-19 and Hand, Foot, and Mouth Disease, demands serious attention. Current climate changes occurring in almost all parts of the world can lead to the emergence of various viruses and bacteria that cause multiple diseases. Exploring medicinal plants that can enhance the immune system is crucial to be continued. This study aims to identify secondary metabolite compounds contained in Bridellia Micrantha plants using chemical reagents and gas chromatography-mass spectrometry (GC-MS) instruments. This research is an experimental laboratory study. The variable studied is the content of secondary metabolite compounds. Data were collected using chemical reagents and instruments. The obtained data are described in informative tables and graphs. Based on the identification results using instruments, positive results were found for organic compound groups such as flavonoids, alkaloids, and tannins. GC-MS test results showed that the organic compounds  contained in Bridellia Micrantha extract are 43.05% hexadecanoic acid, 21.46% oleic acid, 16% docos-13-enoic acid, 3.89% octadecanal, 1.85% propanediol, and 0.91% trans-phytol. Literature reviews indicate that the organic acids in Bridellia micrantha extract have clinical activities as antioxidants and anti-inflammatory agents, while organic compounds containing hydroxyl groups have clinical activities as anti-cancer agents. Based on these findings, Bridellia micrantha extract has the potential as a medicine that can enhance the body's immunity.  ]]>
